Home / 427,926.06-641,990.40-139,736.28

Finding the Fourth Proportional to 427,926.06, 641,990.40 and 139,736.28

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Solution

The fourth proportional to 427,926.06, 641,990.40 and 139,736.28 is: 209,637.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,926.06 : 641,990.40 = 139,736.28 : x
  2. Step 2: Convert to fraction form
    427,926.06/641,990.40 = 139,736.28/x
  3. Step 3: Cross multiply
    427,926.06x = 641,990.40 × 139,736.28
  4. Step 4: Simplify right side
    427,926.06x = 89,709,350,291.71
  5. Step 5: Solve for x
    x = 89,709,350,291.71/427,926.06
  6. Step 6: Final answer
    x = 209,637.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.